Control system.



PATENTED DEC. 3, 1907.

G. H. HILL.

CONTROL SYSTEM.

uruouxou mum nov. 27, 1905.

flwentor flea/7e H. H/LL ym- Atty.

III!" W/Z'nesses GEORGE H. HILL, OF SCHENEGTADY, NEW

YORK, ASSIGNOR TO GENERAL ELECTRIC ()OMPANY, A CORPORATION OF NEW YORK.

CONTROL SYSTEM.

sat 872,563.

Specification of Letters Patent.

Patented Dec. 3, 1907 Application filed November 27. 1905. Serial ROI289,155.

To all "LU/tlII/t it may concern:

Be it known that I, GEORGE H. HILL, a citizen of the United States,residing at Schcncctad county of Schenectady, State of New Yorh, haveinvented certain new and useful Improvements in, Control Systems, ofwhich the following is a specification.

The present invention relates to systems of motor control and moresystems arranged to control t e operation of a plurality of motors orgroups of motors, It frequently becomes necessary to cut one or moremotors out of circuit and when this isdone and the remaining motors areoperated and controlled in the usual we. from the master controller itis desirable t at the most advantageous circuit conditions be securedwith the altered system.

The object of the present invention is to provide means whereby when oneor more motors of a system is eliminated from the circuit, the controlsystem shall be changed so as to givethe most advantageous operation ofthe remaining motors.

The present invention will be more fully understood from the followingdescription thereof taken in connection with the accompanyin drawingwhich shows diagrammat lcally t 18 motor and control equipment for ara1lway car arranged in accordance with the resent invention.

T e system illustrated, except as modified in accordance with thepresent invention, is substantially the same as that shown in my PatentNo. 801,238, granted Oct. 10, 1905; M and M representing two motors, C amotor controller of the separately actuated contact type, K and K mastercontrollers and C B a circuit breaker: the control apparatus beingarranged to connect the motor to the source of current supply in serieswith each other and in series with a definite amount of resistance, toeliminate the, resistance by a series of steps, to connect the motors inarallel to the source of current supply an with a different amount ofresistance in circuit, and finally to eliminate this latter resistanceby successive steps. It is of course understood that the form of controlapparatus may be varied at will, the apparatus-shown being, however,indicative o a preferred arrangement.

Either of the motors may be removed from the circuit by means of acut-out switch particularly to l H of any usual or preferred type.Associated with the main cut-out switch is an auxiliary switch itarranged to change the control circuit, in a manner to be hereinafterdescribed, when the cut-out switch is operated to remove either motorfrom the circuit. The controller C comprises a series of switches T toT', inclusive, ada ted to connect the motor circuit to trol e thecircuit-breaker is closed, alt oughthe switches need not all be closedat the same time. S is a series switch, P and P parallel switches, R, R,R'and R resistance con- 1 trolling switches, these latter switchesdetermimng the arrangement and proportion of the resistances r and 1 inthe motor circuit.

Assuming the parts to be in the position shown: then, when it is desiredto start the motors, the switch a; is closed and the switch 2:, uponbeing tempqrari closed, allows cur- T when rent to flow from trolley Ithroughswitches x, :0 thro h the fixed contact 7c of the master controler, to train wire 3, through wire-' 30 and a portion of resistance 31,the;

through the interlock t on the first switch, thence through theactuating coil 0 of the circuit breaker, to ground. The circuit breakeris now closed and 'ismechanically maintained closed through latchmechanism 0. Upon moving the master controller K (illustrated as adeveloped cylinder carrying wit movable contacts adapted to engage fixedfin ers) am that t e fixed contacts engage wit movable contacts alongline 1 1,

current flow from trolley, through switch at,

blow-out 00' B 0, switch K, contacts 7c, 2",

1', 1:, train wire 7, thencethrough the actuating-coils of the lineswitches T, T, T,

through contacts 9, 10 and 11 of switch It,

through the actuating coil of the series switch S, through the auxiliarycontact p on the parallel switch P, to trainwire 1, and thence thro hmaster controller contacts k", 9", 8" an it, to ground. The motors arenow connected in series between trolley and ground and in series withthe resistance sections r, r, r and 1'. On moving the master controller.to its second position, the switch "R is closed, thereby short circuitiresistance 1*. In the third' osition of t e master controller switch Ris closed, short cir l B ll the resistance and ;connected in series I acill-Quits of t 'ii'opened htm gh the '15 switch it, thr

: parallel with resistance section r.

eliminatin 4 5 'of controller, all the i not been traced'in detailalthough they are ti'ated;

. movable contacts along second and third cases,

05. movable contacts along lines 1 resistances 1" and r in parallel'stances r and r. In the fifth runj ition, switchesR and T, as well asFR, are closed, thereby eliminating leavi jthe-motors ross Ego-(line; Inplosition of v the controller the cir .e resistance and series switchesand the current, after passin actuating, coils of switches and T, nolonger p asses' through the actuatmg coil of switch but follows abran'ch cit-- cult through the actuating coil of switch T, thencethrough contacts 12,- 1'3-and l4 of the ough the' actuating coils ofswitches P and 1?, through interlock s on the the siith series switch,thence to train wire 2 and ough master controller contacts k, 17", 18",7c", to ground. Current now flows from trolley through switches T, 'land T through resistance sections 1' and 1", and thence through thetwomotors in parallel. It is seen, therefore, that the resistance in themotor circuit in the first arallel position dif fers from that in therst series positionr In the second parallel osition, namely, when themaster controller is moved to position 7, switches R and R are closedand resistance section r is thereby cut in I In the eighth runningposition, switch T is closed and resistances r and are grouped inparallel with the resistance previously in circuit.

In position 9 switch R is closed, thereby resistance section r from thecircuit an thus again decreasing the @total reslstance. In the finalposition, switches T and Ra're closed and, since these two switchesclose shunts about all the resist- 40 ances, the

motors remainconnected across line in parallel with each other and noexternal resistance in circuit. Since the with

take place ordinarily in an old form various circuits have clearlyapparent on the drawing; e normal operation of the controller ismod'ifid when a cut-out switch is operated e 60 to remove either motorfrom the circuit.

' The cut-out switch is shown as having three positions: onein which thefixed contacts on th of the switches II and h engage with the movablecontacts along lines 10 0, as; illusand the other two positions, thosein. which the fixed" contacts engage with the lines-1 1 and lines 2 2,respectively, In the first caseyboth;

circuit, while in the motors M ahd M, respectively, are removed fromthecircuit. Assuming that it is desired to cut out the motor. M, thecut-outswitch is moved to the right until the fixed contacts engage with themotors are included in dent that the circuit of motor M r 17, 18 and 19,so that operated in the I controller.

the operations heretofore described are those who terrupted at contactswhen the master controller is in its' series running positions the motorcircuit, which under normal conditions passes through resistancesections 7" to r througli'contacts 17,

is now in IS'an'd 19 of the cut-out switch, remains in-" terrupted andno current passes,to eithermotor durin anyof the series runni tions. ItW1 out of engagement with the fixed contacts, and that nected ,tonected-to contact 14, and contact 11 to con tact 12. Under normalconditions the con-.- trol circuit, when the master controller is in itsfirst running actuating coils 0 line switches T Ttand T", thence to andthrough the auxiliary switch it, through the actuatin coil of the'seriesswitch, train wire 1, am? thence to ground 's circuit is now, however,interrupted at the switch it so that the current is compelled to followa branch circuit after leaving the actuating coil of switch T and thenceflows through the actuating coil of switch T through conta'ctsl2, 16,

Although this operation of controller probe noticed, however, t at thecontacts 10 and 13 on the switch it are moved contact 9, instead ofbeing concontact 11, as'before, is now con- 1 osition passes through theand ll of switch It, and-thence through tlieactuating coil of the seriesswitch and to ground as before.

duces no e'liecton the motors it will be no ticed that the line switchesclosed during the st position of the master controller are those whichare normally closed during the first arallel position,

In. li'l Ze manner, as will .ap ear, the line switches which are closedin tli position when one of the motors iscut out are those which undernormal conditions are first series position of the Assuming that themaster controller has reached its first parallel runnin currentflowsfrom trolley throng the nice ter controller to train throu h theactuating coils of switches T 2 and 'l through contacts 9, 15, and 14 ofswitch 71. to the actuating coils of the parallel switches P and Pthrough the interlocks on the series switch, thence to train wire 2 andthrough the master controller, to ground, as

The circuit for the previously described.

from trolley motor M is now as" follows:

through the circuit breaker, through the line resistance employed switchT to T t; through resistances r r3, 1 and rt, through switch P, throughcontacts 20, 21, 22, of'the cut-out switch,- through the motor Mt,toground. Thus the single motor remaining in circuit is protectedbytheusual is now in its parallel running position. the second parallelposition,

wlre 7, and thence when the motors are; connected in series although thecontroller In current i lows e first parallel 101, namely; position 6.

menses a the -ciiiitact k, thence to train wire 4 and through actuatingcoils of switches R and Rgthus cutt' out resistance sections r and p1,;the third parallel position, current 5 from trolley through the contactsof the master controller to contact k and thence to train 5 and throu hthe actu- "2; coil of switch '1 through tiie actuating R and R, .t0ground; resist- H and r. are left in circuit, but are now d'inparallelwith resistances -r and 'tlrr the-next position of the controller,fiziirrent flows-from trolley through the contaicts of the mastercontroller, to the coni3'5 nectedicontacts k and k, thence to train I3," through wire 3, through interlocks .1) connected with switch P, tothe actuating coil of switch R, and thence through the ac- .ituatincoils of switches T, R, It, 'to

.20 grounr The closing of the switch R cuts of the cut-out switch whichcontacts also en-.

tirely open-circuitthe motor M; The control circuits are modified justas in the position of the cut-out switch which eliminates motor M.

It is evident that by the present invention it is made possible toremove motors from 40 a system without in any way rendering the mode ofcontrol .of the remaining motor or motors disadvantageous orundesirable.

Also where a number of separate equipments are connected together, asseveral motor cars of a train, the number of motors 'in operation on anycar may be altered without affecting the motors on the remaining cars,althou h the local control circuits are so modified that the bestresults are obtained with the remaining portion of the motor system.

Although I have described at considerable length one form of controlsystem modified in accordance with the resent invention, it

is of course understoo that the'details of construction and mode ofoperation of the control system enters into the present invention 'onlyto the extent indicated in the following claims. a

that I claim as new and desire to secure by Letters Patent of the-UnitcdStates, is,

1. In a system of control, a motor circuit, a motor controllercomprising a plurality of individual switches for governing said motorcircuit, a governing system arranged to operate said switches normallyin a predetermotor circuit.

mined order, and means for modifying said system-so as to change theorder in which certain of said switches are actuated.

2 In a system of control, a plurality of motors, a switch forcuttingoneof said motors outof circuit, a motor controller com prising aplurality of individual. switches,.-a

controlling system arranged to normally operate said switches in apredetermined order, L and means controlled by said cut-ou t;switch forchanging the order, in which certain of said switches are operated.

3.. In a system of motor control, a motor circuit, a motor controller ofa separatelyso actuated switch type including speed controllingswitches, a governing system for said motor controller arrangedJt-onormally opcrate said speed controlling switches in a definite order,and means for modifying sald governing system to ya the order of 0eration of certain of sai speed control ing switches. G 4. In a systemof control, a plurality of motors, a resistance, a series parallel motorcontroller of the separately-actuated switch type includingswitchesadapted to vary the amount of resistance in'the motor circuit, a

master controller and connections constructed and arran ed o eratepne ofsaid res1st- 95 ance switches in t 0 series position of the mastercontroller and another in the arallel position, and means for modifyingt e conncctions so as to reverse the order inwhich said latter switchesare operated.

5. In a system of motor control, a plurality of motors, a resistance, aseries parallel con i troller arranged to connect said motors in serieswith a' portion-of. said resistance in circuit and in parallel with adifferent portion of said resistance in circuit, and means for reversingthe order in which said portions of resistance are included in the motorcircuit.

.6; In a system of motor control, a plurality of motors, a cut-outswitch for removing one of said motors from the circuit, a resistance, aseries parallel controller arranged to connect sair motors in serieswith a portion of saidresistance' in circuit'and in parallel with adifferent portion of said resistance in circuit, and means controlled bysaid cut-out switch for reversing the order in which said portions ofresistance are included in the 7. In a system of motor control; aplurality of motors, a cut-outswitch for removing one of said motorsfrom the circuit, a resistance. a series parallel motor'controller ofthe separately actuated switch type, including switches adapted to varytheam'ount of resistance in thc'niotor circuit, a master controllerand'connections constructed and arranged to cause said motor controllerto connectthe motors in series'with a portion of said resistance incircuit in the series posi by a master controller, two electric motors rand resistance: therefor, ofla :filectige controlling swit c aving a pur 'ty 0 osi- 15 itions by which said control system may he so modifiedas to insure normal operation of both motors and the normal operation ofeither motor without. the other. when the 4 I emcee master controllersuccessively occupies J3 riesofpositions. 9. In asystem of control, a

translating devices, a plurality o P e i indivi ual switches foradjusting the circuits thereof," a master controller for actuating saidswitches a switch for cutting one, or moreof ,trans- 25 I lating devicesout of; circuit, and inanscon- Z' trolled by .said cutting out swiswitches are actuated.

In witness whereof, I have hereunto. set my 'hand this 2 5th. day ofNovember, 1Q05.f

GEORGE HQrnLL- Witnesses:

BENJAMIN-B. HULL, HELEN Oaronn.

l-I 1 61 trolling the order infwhich the

